Small changes for Slayer and Sequitur

Slayer
* Changes in summary/description
* Added REQUIRES
* Moved makefile_engine to BUILD_PREREQUIRES
* Removed mkdepend
* Sorted BUILD_PREREQUIRES

Sequitur
* Removed mkdepend
* Corrected copy command in INSTALL()
  cp doesn't like -a when -L is used.

haiku-apps/sequitur/sequitur-20140717.recipe

@@ -47,7 +47,6 @@ BUILD_PREREQUIRES="
 	makefile_engine
 	cmd:make
 	cmd:gcc
-	cmd:mkdepend
 	"
 
 BUILD()
@@ -64,7 +63,7 @@ INSTALL()
 
 	cd Sequitur
 	cp -a lib/libAmKernel.so $appsDir/Sequitur/lib
-	cp -arL add-ons $appsDir/Sequitur
+	cp -rL add-ons $appsDir/Sequitur
 	cp -a Sequitur $appsDir/Sequitur
 	cp -ar Examples $dataDir/Sequitur
 	cp -ar docs/* $docDir

haiku-apps/slayer/slayer-0.9.recipe

@@ -1,8 +1,6 @@
-SUMMARY="Team/thread manager"
-DESCRIPTION="
-Monitor CPU and memory usage for running thread and teams, adjust their \
-priorities or kill them.
-"
+SUMMARY="A tool to manage teams and threads"
+DESCRIPTION="Monitor CPU and memory usage of running threads and teams, \
+adjust their priorities or kill them."
 LICENSE="GNU GPL v3"
 COPYRIGHT="1998 Arto Jalkanen."
 HOMEPAGE="https://github.com/HaikuArchives/Slayer"
@@ -14,16 +12,16 @@ PROVIDES="
 	slayer = $portVersion
 	app:Slayer = $portVersion
 	"
-
+REQUIRES="
+	haiku
+	"
 BUILD_REQUIRES="
 	haiku_devel
-	makefile_engine
 	"
-
 BUILD_PREREQUIRES="
-	cmd:make
+	makefile_engine
 	cmd:gcc
-	cmd:mkdepend
+	cmd:make
 	"
 
 BUILD()